Definitions from Wiktionary ( )

▸ verb:  (transitive) To bring down the size, quantity, quality, value or intensity of something; to diminish, to lower.
▸ verb:  (intransitive) To lose weight.
▸ verb:  (transitive) To bring to an inferior rank; to degrade, to demote.
▸ verb:  (transitive) To humble; to conquer; to subdue; to capture.
▸ verb:  (transitive) To bring to an inferior state or condition.
▸ verb:  (transitive) To be forced by circumstances (into something one considers unworthy).
▸ verb:  (transitive, cooking) To decrease the liquid content of food by boiling much of its water off.
▸ verb:  (transitive, chemistry) To add electrons / hydrogen or to remove oxygen.
▸ verb:  (transitive, metallurgy) To produce metal from ore by removing nonmetallic elements in a smelter.
▸ verb:  (transitive, mathematics) To simplify an equation or formula without changing its value.
▸ verb:  (transitive, computer science) To express the solution of a problem in terms of another (known) algorithm.
▸ verb:  (transitive, logic) To convert a syllogism to a clearer or simpler form.
▸ verb:  (transitive, law) To convert to written form. (Usage note: this verb almost always appears as "reduce to writing".)
▸ verb:  (transitive, medicine) To perform a reduction; to restore a fracture or dislocation to the correct alignment.
▸ verb:  (transitive, military) To reform a line or column from (a square).
▸ verb:  (transitive, military) To strike off the payroll.
▸ verb:  (transitive, Scots law) To annul by legal means.
▸ verb:  (transitive, phonetics, phonology) To pronounce (a sound or word) with less effort.
▸ verb:  (transitive, obsolete) To translate (a book, document, etc.).

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